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1 NAIST-IS-DD
2 ( )
3 , NAIST-IS- DD , i
4 ENUM,,, GPS, ENUM, SIP, PKI ii
5 Lifeline Communication System in the Internet Takahiro Kikuchi Abstract As the Internet spreads, it is increasing in importance as the infrastructure for various communication services. Lifeline communications such as emergency calls, registring safety information, or getting disaster information, should be available if there is the Internet connectivity. Lifeline communications over the Internet offer highly convenient services for various people with advanced multimedia support. However, there are various problems in the realization on the Internet of the function of lifeline communications performed on traditional media such as the telephone. The first problem is the routing for lifeline communications. In an emergency call, it is necessary to connect to the nearest lifeline service agency. For example, a telephone user can start an emergency call with a simple access means such as 110 or 119. Moreover, a user needs to know the correct Internet address to connect when he wants to get any disaster information about his current location. The second problem is the handling of the identity information of the caller. In an emergency call or a registration of safety information, the caller needs to be identified in order to prevent fake calls or nuisance calls and to make a callback possible. The third problem is the handling of the geographical location information where the caller is actually located. The geographical location information of the caller is necessary when going to help in the case of an emergency call or when registering safety information. Doctoral Dissertation, Department of Information Systems, Graduate School of Information Science, Nara Institute of Science and Technology, NAIST-IS-DD , February 3, iii
6 In this paper, I discuss these problems and aim at the establishment of a common base technology for lifeline communications over the Internet. I propose three models, the ENUM based on geographical location information model, the geographical location information certificate model, and the user information certificate model. I have implemented the lifeline communication system with a design based on these three proposal models, and performed verification experiments and performance evaluations. The results showed that this system is sufficiently practical in respect of performance, security, privacy and scalability. Keywords: lifeline communication, emergency call, geographical location, GPS, ENUM, SIP, PKI iv
7 v
8 PSTN ENUM HTTP/SIP DHCP DNS GPS vi
9 ENUM ENUM ENUM GPS vii
10 2.1.1 IP SIP SIP IP CA CA CA IP viii
11 3.5.2 DNS IP ix
12 IP DHCP ENUM DNS DHCP x
13 ( ) ( ) GPS xi
14 xii
15 xiii
16 xiv
17 ADSL FTTH LAN 1.2 1
18 IPv6 2
19 2.2 ENUM 3
20
21
22 IAA (I Am Alive) [6]
23 PSTN (Public Switched Telephone Network) PSTN 3 (110 ) (119 ) ( PSTN PSTN 7
24 2.1.3 PSTN GPS
25 PSTN PSTN IX(Internet Exchange) ADSL 9
26
27 IAA IAA 11
28 IP IP 12
29 (JOIN) ( ) 13
30 ( )
31 2.1 ( ) ( )
32 3. PSTN PSTN PSTN PSTN PSTN 3.1 PSTN PSTN IP PSTN 3.2 PSTN IP IP IP 16
33 IP 3.3 IP example.jp host1.example.jp DNS[8] IP IP SIP [9] URI (Uniform Resource Identifier) [10] SIP FTP ftp://ftp.example.jp/ SIP IP 17
34 FTP IP DNS SIP DNS IP [11] 3.4 PSTN ISP (Internet Service Provider) PSTN ISP IP IP ISP IP ISP SIP SIP 4. 18
35 4.1 ENUM IP IP IP (URI) IP ENUM (Telephone Number Mapping) [12] IETF(Internet Engineering Task Force) ITU-T(International Telecommunication Union Telecommunication sector) ENUM ENUM E.164 [13] DDDS (Dynamic Delegation Discovery System) [14] DNS NAPTR SIP ENUM ENUM 19
36 4.2 HTTP/SIP HTTP [15] 4.3 GLI System [17][18] 4.4 DHCP DHCP[19] [20][21] DHCP DHCP 20
37 4.5 DNS DNS [22][23] DNS DNS 21
38 22
39 PSTN
40 1.2 PSTN 110 TV
41
42
43 GPS GPS GPS GPS GPS GPS 27
44 GPS GPS GPS GPS RFID DHCP GPS
45 IP IP ADSL ADSL IP IP IP IP IP IP IP IP IP 29
46 VoIP SIP IP SIP IP SIP SIP IP SIP 3.3 SIP 30
47 VoIP SIP SIP SIP SIP SIP SIP SIP
48 3.5 32
49 4 ENUM 1. ENUM ENUM 1.1 ENUM ENUM URI IETF ITU-T 4.1 ENUM E.164 ENUM e164.arpa. DNS NAPTR
50 e164.arpa. NAPTR DNS 4.1 SIP ENUM SIP VoIP 34
51 1.2 ENUM ENUM ENUM ENUM ENUM ENUM ENUM ENUM 4.1 ENUM ENUM ENUM police police.emergency.demo ENUM e164.arpa emergency.demo NAPTR DNS ENUM URI 4.1 (URI) SIP 35
52 VoIP ENUM DNS ENUM DNS GPS GPS LAN Ether 36
53 LAN [25] ADSL CATV FTTH VPN IP IP IP GPS IP CA CA IP IP IP 4.2 (1) 2001:200:169::/48 IP 2001:200:169::/48 IP IP IP IP 37
54 S/MIME SIP VoIP SMTP ( ) HTTP ( ) IP CA 4.3 (2) 38
55 4.3 IP 4.3 (3) IP IP IP IP IP 39
56 2.4 GPS 4.4 GPS GPS GPS GPS 4.4 GPS 40
57 3. SIP IP IP CA CA 4.5 (1) test.demo 4.5 (2) user1 41
58 (1) S/MIME VoIP SIP SMTP HTTP CA 4.6 (2) 42
59 IP 4.6 (3) IP IP
60 44
61 5 ENUM ENUM ENUM 5.1 ( 2.1) ( 2.3) ( 2.2) ( 2.4) 45
62 ENUM ENUM DNS DNS 1.2 IP 46
63 1.3 SIP SIP 1.4 GPS GPS 1.5 SIP IP IP IP 1.6 URI ENUM URI 47
64 S/MIME SIP GUI Send Recv 2.1 IP SIP 48
65 5.2 49
66 2.1.1 IP IP DHCP IP (2001:200:169:242::20) DNS IP SIP SIP SIP SIP IP SIP SIP IP SIP: SIP REG- ISTER SIP Unauthorized SIP test.demo
67 S/MIME HTTP GET IP SIP
68 5.2 Emergency Call Police ) Ambulance Gas Electricity Police ENUM ENUM DNS 4 1 ENUM police.emergency.demo NAPTR ENUM DNS NAPTR 10 SIP sip:request@nara-police.demo 11 mailto:request@narapolice.demo
69 NAPTR SIP SIP SIP SIP INVITE SIP INVITE 53
70 2.3.2 GPS GPS GPS GPS GPS GPS GPS HTTP GET GPS GPS S/MIME HTTP GET SIP REGISTER 21 Unauthorized GPS 54
71 GPS SIP INFO [26] S/MIME SIP INFO SIP SIP SIP SIP SIP INVITE SIP INVITE Send Recv GPS
72 Verify OK 08 OK 10 OK
73 GPS IP CA IP IP root CA 57
74 IP :200:169:242:20 IP IP IP :200:169::/48 GPS Verify OK 11 OK 13 OK CA root CA 58
75 5.5 IP :200:169:242:20 IP test.demo SIP INVITE OK 59
76 2.5 SIP ACK SIP ACK SIP SIP 2.6 SIP SIP BYE BYE IP CA IP CA (IP Address Authority) CA
77 CA 5.6 CA IP IP IP IP IP IP CA 61
78 3.2 CA (Domain Name Authority) CA 5.7 CA CA 5.7 CA 62
79 CA 3.3 CA CA CA RIR (Regional Internet Registry) NIR (National Internet Registry) ISP CA IP CA CA IP IP IP CA 2001:200::/32 CA IP IP 2001:200:169::/48 CA CA IP 2001:200:169::/ :200:169:100::/64 IP IP IP CA NIR TLD (Top Level Domain) CA TLD 63
80 3.4 IP IP IP IP IP IP IP 64
81 IP IP IP IP IP IP IP IP IP IP 65
82 IP ENUM DNS DNS DNS DNS preference DNS 66
83 DNS 5.1 NAPTR "u" "E2U+sip" NAPTR "u" "E2U+sip" NAPTR "u" "E2U+sip" NAPTR "u" "E2U+sip" 5.1 main.nara.police sub.nara.police DNS 5.1 DNS IP IP URI IP URI DNS DNS IP SIP SIP proxy SIP 4. 67
84 4.1 IP 2 IP IP[27] IP IP
85 69
86 70
87 SIP VoIP PC Intel Pentium III 1200MHz 71
88 RSA/SHA1 RSA bit 1024bit 2048bit 4096bit 2.71ms 13.79ms 82.20ms ms 2.72ms 13.81ms 81.98ms ms 1.38ms 2.53ms 6.38ms 19.81ms 1.39ms 2.56ms 6.41ms 19.82ms bit 1024 bit 2048 bit 4096 bit bit 4096 bit Bytes 151 Bytes Bytes 346 Bytes 512 Bytes
89 Bytes ( ) 82.20ms 6.38ms 346Bytes ( ) 81.98ms 6.41ms 512Bytes 82.02ms 6.52ms 1024Bytes 86.36ms 6.43ms 1536Bytes 86.46ms 6.49ms 2048Bytes 86.51ms 6.59ms Bytes 1536 Bytes 2048 Bytes Pentiumu III 1.2GHz PC 4096 bit ( 1 50 )
90 Thtoughputs [Requests / Minute] Verification of Certificates Issue of Certificates Key Length of Public Key Certificate [bits] LAN bit 1024 bit 2048 bit 4096 bit LAN WAN LAN RTT (Round Trip Time) 74
91 6.3 ( 5.2 ) 512bit 1024bit 2048bit 4096bit (08) Request Start (09) GeoENUM 0.1ms 0.2ms 0.2ms 0.2ms (12) OK GeoENUM 5.8ms 5.9ms 6.0ms 5.9ms (13) INVITE 13.9ms 14.2ms 13.8ms 13.8ms (14) Trying 10.9ms 10.9ms 11.1ms 10.8ms (15) Ringing 0.9ms 0.8ms 0.7ms 0.9ms (16) GET GPS 1.9ms 1.6ms 1.7ms 1.8ms (17) OK GPS 105.9ms 102.5ms 103.2ms 101.0ms (18) GET GeoCert 0.7ms 0.7ms 0.7ms 0.7ms (19) OK GeoCert 7.9ms 18.8ms 87.4ms 560.6ms (20) GET UsrCert 0.5ms 0.5ms 0.5ms 0.5ms (21) OK UsrCert 4.8ms 4.0ms 4.2ms 4.4ms (22) GET UsrCert 0.7ms 0.7ms 0.8ms 0.7ms (23) OK UsrCert 11.2ms 20.8ms 90.5ms 567.5ms (24) INFO GPS 0.7ms 0.6ms 0.7ms 0.8ms (25) OK GPS 8.2ms 8.1ms 8.7ms 8.5ms (26) INFO GeoCert 0.6ms 0.6ms 0.7ms 1.1ms (27) OK GeoCert 12.8ms 13.7ms 16.7ms 27.1ms (28) INFO UsrCert 0.5ms 0.5ms 0.6ms 1.2ms (29) OK UsrCert 13.2ms 13.6ms 16.1ms 25.5ms (30) Request End 0.3ms 0.2ms 0.2ms 0.3ms (31) OK INVITE 83.9ms 89.8ms 86.9ms 84.5ms (32) ACK INVITE 0.9ms 0.9ms 0.9ms 0.9ms (33) Established 0.3ms 0.4ms 0.3ms 0.3ms Total Time 286.6ms 310.0ms 452.6ms ms 75
92 RTT SIP INFO 4096 bit
93
94 ENUM (URI) IP 78
95 2.3.2 IP IP IP 79
96 2.3.5 DNS IP IP DNS IP IP PKI [28] S/MIME [29] SMTP HTTP SIP 80
97 IP
98
99 3.1.1 IP IP IP IP [30] IP IX (Internet Exchange) ISP IP IX IP IP VoIP ENUM DNS 83
100 3.1.2 DHCP ENUM DHCP IPCP DHCP SIP DHCP ENUM DNS DHCP ENUM ENUM 84
101 3.1.3 ISP IP ENUM IP ENUM ENUM 85
102 DNS ENUM ENUM ENUM ENUM DNS DNS DNS DNSSEC SIP SIP SIP ENUM 86
103 GPS GPS GPS GPS GPS DNS DNS RFC1712 (DNS Encoding of Geographical Location) [22] RFC1876 (A Means for Expressing Location Information in the DNS) [23] RFC1712 RFC1876 RFC DNS 87
104 DNS GPS DNS DNS DNS DNS DNS DHCP DHCP DHCP [20] DHCP [21] DHCP DNS 88
105 DHCP DHCP HTTP [15]
106 90
107
108 92
109 7 1. ENUM 93
110 IP 2. ( ) 5 IP 94
111 3. 95
112 96
113 KDDI IP 97
114 98
115 1. Takahiro Kikuchi, Masaaki Noro, Katsuyuki Yamazaki, Hideki Sunahara, Shinji Shimojo, Design and Implementation of Lifeline Communication System in the Internet, IEICE Transactions on Information and Systems, Vol.E87-D, No.12, pp , December ( ) 1. Tohru Asami, Takahiro Kikuchi, Kenji Rikitake, Hiroshi Nagata, Tatsuaki Hamai, Yoshinori Hatori, A Taxonomy of Spam and a Protection Method for Enterprise Networks, Proceedings of the 16th International Conference on Information Networking (ICOIN16), pp.3b , January Takahiro Kikuchi, Masaaki Noro, Hideki Sunahara, Shinji Shimojo, Lifeline Support of the Internet, Proceedings of 2003 Symposium on Applications and the Internet (SAINT2003) Workshops, IEEE Computer Society, pp , January Takahiro Kikuchi, Masaaki Noro, Katsuyuki Yamazaki, Hideki Sunahara, Shinji Shimojo, Lifeline Communication System in the Internet, Proceedings of 2004 Symposium on Applications and the Internet (SAINT2004) Workshops, IEEE Computer Society, pp , January
116 1.,,,,, IP, Proceedings of IPSJ Computer Security Symposium 2001 (CSS2001), pp , October ,,,,,, SPAM, Proceedings of IPSJ Computer Security Symposium 2001 (CSS2001), pp , October ,,,,, 2002, pp.116, October ,,,,,, IA , pp.9 15, July ,,,,,,,, IP,, pp.1 354, March ,, VoIP 11, April
117 [1] Takahiro Kikuchi, Masaaki Noro, Hideki Sunahara, Shinji Shimojo, Lifeline Support of the Internet, Proceedings of 2003 Symposium on Applications and the Internet (SAINT2003) Workshops, IEEE Computer Society, pp , January [2],,,,,, IA , pp.9 15, July [3],,,,, VoIP, IA , pp.25 30, January [4] Masaaki Noro, Takahiro Kikuchi, Ken-ichi Baba, Hideki Sunahara, Shinji Shimojo, QoS Support for VoIP Traffic to Prepare Emergency, Proceedings of 2004 Symposium on Applications and the Internet (SAINT2004) Workshops, IEEE Computer Society, pp , January [5] Takahiro Kikuchi, Masaaki Noro, Katsuyuki Yamazaki, Hideki Sunahara, Shinji Shimojo, Lifeline Communication System in the Internet, Proceedings of 2004 Symposium on Applications and the Internet (SAINT2004) Workshops, IEEE Computer Society, pp , January [6] Nobuhiko Tada, Yukimitsu Izawa, Masahiko Kimoto, Taro Maruyama, Hiroyuki Ohno, Masaya Nakayama, IAA System (I Am Alive): The Experiences of the Internet Disaster Drills, Proceedings of INET2000, July
118 [7] Postel, J., Internet Protocol, RFC 791, September 1981 [8] Mockapetris, P., Domain names - concepts and facilities, RFC 1034, November 1987 [9] Rosenberg, J., Schulzrinne, H., Camarillo, G., Johnston, A., Peterson, J., Sparks, R., Handley, M., Schooler, E., SIP: Session Initiation Protocol, RFC 3261, June 2002 [10] Berners-Lee, T., Fielding, R., Masinter, L., Uniform Resource Identifiers (URI): Generic Syntax, RFC 2396, August 1998 [11] Rosenberg, J., Schulzrinne, H., Session Initiation Protocol (SIP): Locating SIP Servers, RFC 3263, June 2002 [12] Faltstrom, P., Mealling, M., The E.164 to Uniform Resource Identifiers (URI) Dynamic Delegation Discovery System (DDDS) Application (ENUM), RFC 3761, April 2004 [13] ITU-T, The International Public Telecommunication Number Plan, Recommendation E.164, ITU, May 1997 [14] Mealling, M., Dynamic Delegation Discovery System (DDDS), RFC , October 2002 [15] Andrew Daviel, BSc., Geographic extensions for HTTP transactions, draft-daviel-http-geo-header-04, Internet Draft, July 2003 [16] Andrew Daviel, BSc., Geographic registration of HTML documents, draftdaviel-html-geo-tag-06, Internet Draft, July 2003 [17] Sohgo Takeuchi, Yasuhito Watanabe, Fumio Teraoka, The GLI System: A Global System Managing Geographical location information of Mobile Entities, Proceedings of the 3rd International Symposium on Wireless Per- 102
119 sonal Multimedia Communications (WPMC2000), IEEE, Bangkok, Thailand, November 2000, pp [18] Michiko Izumi, Sohgo Takeuchi, Yasuhito Watanabe, Keisuke Uehara, Hideki Sunahara, Jun Murai, A Proposal on a Privacy Control Method for Geographical Location Information Systems, Proceedings of INET 2000, Internet Society, Yokohama, Japan, June 2000 [19] Droms, R., Dynamic Host Configuration Protocol, RFC 2131, March 1997 [20] Polk, J., Schnizlein, J., Linsner, M., Dynamic Host Configuration Protocol Option for Coordinate-based Location Configuration Information, RFC 3825, July 2004 [21] Schulzrinne, H., Dynamic Host Configuration Protocol (DHCPv4 and DHCPv6) Option for Civic Addresses Configuration Information, draft-ietfgeopriv-dhcp-civil-04, Internet Draft, September 2004 [22] Farrell, C., Schulze, M., Pleitner, S., Baldoni, D., DNS Encoding of Geographical Location, RFC 1712, November 1994 [23] Davis, C., Vixie, P., Goodwin, T., Dickinson, I., A Means for Expressing Location Information in the Domain Name System, RFC 1876, January 1996 [24] IEC, Maritime navigation and radiocommunication equipment and systems - Digital interfaces, IEC (NMEA 0183), IEC, July 2000 [25] P. Bahl and V. N. Padmanabhan, RADAR: An In-Building RF-Based User Location and Tracking System, Proceedings of the IEEE Infocom 2000, Vol.2, pp , March [26] Donovan, S., The SIP INFO Method, RFC 2976, October 2000 [27] Johnson, D., Perkins, C., Arkko, J., Mobility Support in IPv6, RFC3775, June
120 [28] Housley, R., Polk, W., Ford, W., Solo, D., Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile, RFC 3280, April 2002 [29] Ramsdell, B., S/MIME Version 3 Message Specification, RFC 2633, June 1999 [30] Partridge, C., Mendez, T., Milliken, W., Host Anycasting Service, RFC 1546, November
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i 1 1 1 2 3 5 5 6 7 9 10 11 13 13 14 15 15 16 17 18 20 20 20 21 22 ii CONTENTS 23 24 26 27 2 31 31 32 32 33 34 37 37 38 39 39 40 42 42 43 44 45 48 50 51 51 iii 54 57 58 60 60 62 64 64 67 69 70 iv 70 71
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3 IETF PKI TAM Trust Anchor Management 3. IETF Internet Engineering Task Force PKIX WG 3.1. IETF PKIX WG 1 2006 PKI Public-Key Infrastructure IETF PKIX WG 2007 69 IETF 70 IETF WG PKIX WG 2006 3 2 3.2.
IPSJ SIG Technical Report Vol.2014-EIP-63 No /2/21 1,a) Wi-Fi Probe Request MAC MAC Probe Request MAC A dynamic ads control based on tra
1,a) 1 1 2 1 Wi-Fi Probe Request MAC MAC Probe Request MAC A dynamic ads control based on traffic Abstract: The equipment with Wi-Fi communication function such as a smart phone which are send on a regular
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22 Web Research of a Web search support system based on individual sensitivity 1135117 2011 2 14 Web Web Web Web Web, i Abstract Research of a Web search support system based on individual sensitivity
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21 The private mailers synchronization operation for plural terminals 1125083 2010 3 1 PC PDA SMTP/POP3 1 POP3 SMTP MUA MUA MUA i Abstract The private mailers synchronization operation for plural terminals
IPSJ SIG Technical Report Vol.2010-GN-74 No /1/ , 3 Disaster Training Supporting System Based on Electronic Triage HIROAKI KOJIMA, 1 KU
1 2 2 1, 3 Disaster Training Supporting System Based on Electronic Triage HIROAKI KOJIMA, 1 KUNIAKI SUSEKI, 2 KENTARO NAGAHASHI 2 and KEN-ICHI OKADA 1, 3 When there are a lot of injured people at a large-scale
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A Study on Traffic Characteristics in Multi-hop Wireless Networks 2010 3 Yoichi Yamasaki ( ) 21 Local Area Network (LAN) LAN LAN LAN (AP, Access Point) LAN AP LAN AP AP AP (MWN, Multi-hop Wireless Network)
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Vol.55 No.1 2 15 (Jan. 2014) 1,a) 2,3,b) 4,3,c) 3,d) 2013 3 18, 2013 10 9 saccess 1 1 saccess saccess Design and Implementation of an Online Tool for Database Education Hiroyuki Nagataki 1,a) Yoshiaki
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19 Development of moving image delivery system for elementary school 1080337 2008 3 10 Web Basic Web SAS-2 Web SAS-2 i Abstract Development of moving image delivery system for elementary school Ayuko INOUE
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23 An attribute expression of the virtual window system communicators 1120265 2012 3 1 Virtual Window System Virtual Window System Virtual Window System Virtual Window System Virtual Window System Virtual
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23 Research of the authentication method on the two dimensional code 1145111 2012 2 13 7,, i Abstract Research of the authentication method on the two dimensional code Karita Koichiro Recently, the two
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Evaluation of the Social Benefits of the Regional Medical System Based on Land Price Information -A Hedonic Valuation of the Sense of Relief Provided by Health Care Facilities- Takuma Sugahara Ph.D. Abstract
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26 P2P Proposed a system for the purpose of idle resource utilization of the computer using the P2P 1150373 2015 2 27 P2P P2P peer peer P2P peer P2P peer P2P i Abstract Proposed a system for the purpose
IPSJ SIG Technical Report Vol.2009-DPS-141 No.20 Vol.2009-GN-73 No.20 Vol.2009-EIP-46 No /11/27 1. MIERUKEN 1 2 MIERUKEN MIERUKEN MIERUKEN: Spe
1. MIERUKEN 1 2 MIERUKEN MIERUKEN MIERUKEN: Speech Visualization System Based on Augmented Reality Yuichiro Nagano 1 and Takashi Yoshino 2 As the spread of the Augmented Reality(AR) technology and service,
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GIS Theory and Applications of GIS, 2010, Vol. 18, No.1, pp.79-85 電子タグによる屋内測位を利用した携帯電話からの通報システム 細川直史 * 高梨健一 ** 滝澤修 *** Emergency Call System by Cellular-phone equipped with RFID Positioning Masafumi HOSOKAWA*,
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27 Verification of the usefulness of the data distribution method by browser cache sharing 1160285 2016 2 26 P2P Web Proxy P2P Web Proxy P2P P2P Web Proxy P2P Web Proxy Web P2P WebProxy i Abstract Verification
29 jjencode JavaScript
Kochi University of Technology Aca Title jjencode で難読化された JavaScript の検知 Author(s) 中村, 弘亮 Citation Date of 2018-03 issue URL http://hdl.handle.net/10173/1975 Rights Text version author Kochi, JAPAN http://kutarr.lib.kochi-tech.ac.jp/dspa
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26 A Study on Secure Remote Control Methods 1175078 2015 2 27 Wi-Fi Wi-Fi Wi-Fi Wi-Fi SAS SAS-2 Wi-Fi i Abstract A Study on Secure Remote Control Methods SHINGAI, Tatsuro In recent years, communication
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indoor.locky: LAN 1 1 LAN LAN LAN indoor.locky UGC(User Generated Content) LAN LAN Web LAN API indoor.locky: Wireless LAN Information Platform for Indoor Location Estimation Katsuhiko Kaji 1 and Nobuo
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28 Research of password manager using pattern lock and user certificate 1170369 2017 2 28 Web Web Web Web i Abstract Research of password manager using pattern lock and user certificate Takuya Mimoto In
B HNS 7)8) HNS ( ( ) 7)8) (SOA) HNS HNS 4) HNS ( ) ( ) 1 TV power, channel, volume power true( ON) false( OFF) boolean channel volume int
SOA 1 1 1 1 (HNS) HNS SOA SOA 3 3 A Service-Oriented Platform for Feature Interaction Detection and Resolution in Home Network System Yuhei Yoshimura, 1 Takuya Inada Hiroshi Igaki 1, 1 and Masahide Nakamura
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RippleDesk Using Ripples to Represent Conversational Noise on Internet Shigaku Iwabuchi Takaomi Hisamatsu Shin Takahashi Buntarou Shizuki Kazuo Misue Jiro Tanaka Department of Comupter Science, University
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27 WMN Proposal of routing method that improves transmission capability in WMN 1185081 2016 2 26 WMN Wi-Fi MBCR i Abstract Proposal of routing method that improves transmission capability in WMN KOBAYASHI
8 P2P P2P (Peer-to-Peer) P2P P2P As Internet access line bandwidth has increased, peer-to-peer applications have been increasing and have great impact
8 P2P (Peer-to-Peer) P2P P2P As Internet access line bandwidth has increased, peer-to-peer applications have been increasing and have great impact on networks. In this paper, we review traffic issues for
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Vol. 52 No. 1 257 268 (Jan. 2011) 1 2, 1 1 measurement. In this paper, a dynamic road map making system is proposed. The proposition system uses probe-cars which has an in-vehicle camera and a GPS receiver.
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, Evaluation of Certificate Verification Methods in Mobile Environment Katsuyuki UMEZAWA,, Mitsuhiro OIKAWA, Seiichi SUSAKI, Satoru TEZUKA, and Shigei
, Evaluation of Certificate Verification Method in Mobile Environment Katuyuki UMEZAWA,, Mituhiro OIKAWA, Seiichi SUSAKI, Satoru TEZUKA, and Shigeichi HIRASAWA PKI PKI CRL OCSP CVS 3 3 CVS PKI CVS OCSP
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IPSJ SIG Technical Report Secret Tap Secret Tap Secret Flick 1 An Examination of Icon-based User Authentication Method Using Flick Input for
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LAN 1 2 3 2 LAN WiFiTag WiFiTag LAN LAN 100% WiFi Tag An Improved Determination Method with Multiple Access Points for Relative Position Estimation Using Wireless LAN Abstract: We have proposed a WiFiTag
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28 Confined Decoding System for Medical Data Distributed by Secret Sharing Scheme and Its Security Evaluation 1195046 2017 3 6 DMAT i Abstract Confined Decoding System for Medical Data Distributed by Secret
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TF-IDF TDF-IDF TDF-IDF Extracting Impression of Sightseeing Spots from Blogs for Supporting Selection of Spots to Visit in Travel Sat
1 1 2 1. TF-IDF TDF-IDF TDF-IDF. 3 18 6 Extracting Impression of Sightseeing Spots from Blogs for Supporting Selection of Spots to Visit in Travel Satoshi Date, 1 Teruaki Kitasuka, 1 Tsuyoshi Itokawa 2